Search found 12 matches
- Mon Jun 17, 2013 5:40 pm
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Is this 3D GJK intersection test code correct?
- Replies: 1
- Views: 7371
Re: Is this 3D GJK intersection test code correct?
The termination condition looks questionable. Termination for GJK is hard to get right. Back in the 1990s, Steven Cameron at Oxford and I struggled with this. See his web site for the code. It's possible to get into states where the solver is moving through a sequence of adjacent supports. Are you e...
- Mon Jun 17, 2013 5:26 pm
- Forum: General Bullet Physics Support and Feedback
- Topic: Bullet Physics FAQ, TODO List and Issue Tracker
- Replies: 6
- Views: 119306
Broken link
404 Not FoundErwin Coumans wrote:Bullet Frequently Asked Questions (FAQ)
http://www.continuousphysics.com/Bullet_Faq.pdf
- Wed Jul 26, 2006 4:52 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Do Blender skeletons work with physics yet?
- Replies: 1
- Views: 5449
Do Blender skeletons work with physics yet?
Do skeletons and joints work right with physics yet?
If so, how do you apply a joint torque?
Thanks.
If so, how do you apply a joint torque?
Thanks.
- Wed Jul 19, 2006 5:54 pm
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
- Is moment of inertia properly calculated for convex polyhedra? It is approximated, convex polyhedra, cylinders and cones are currently using an approximation of the local bounding box for inertia. Ah, that's why the spinning top looks kind of wierd. You know about this, right? Free code for momen...
- Wed Jul 19, 2006 1:42 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
- Tue Jul 18, 2006 10:49 pm
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
The spinning top test is working nicely. It's spinning, precessing, slowing down, falling down, rolling, reversing due to friction, and coming to a stop. I'm impressed. Few real-time physics engines get that right. Thanks. Some minor questions: - Where do you set coefficient of friction in the Blend...
- Mon Jul 17, 2006 7:13 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
The reference says that no object should be bigger than 50 units, so I reduced the big static convex to 45 x 45 x 1. With that, the objects stabilized properly. Now, on to the harder cases. (I understand you're trying to do this in single precision. Unless you really need to be on the PS2, don't do ...
- Sun Jul 16, 2006 9:06 pm
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
Submitted bug report with .blend file
OK, made a bug report at http://projects.blender.org/tracker/ind ... 9&atid=306which includes a .blend file.
- Sun Jul 16, 2006 6:15 am
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
No, it really doesn't work.
Hey John, Make sure that the right bounds are set to the objects. Press "n" in the 3d-window, once the big cube is selected, and make sure that scale is 1:1:1. You can apply the scale and rotation of an object by hitting ctrl+a OK, did that and fixed the scaling. Now the cone doesn't sett...
- Sat Jul 15, 2006 10:34 pm
- Forum: Physics authoring tools, serialization, standards and related topics
- Topic: Blender 2.42 release physics bug report
- Replies: 10
- Views: 16069
Blender 2.42 release physics bug report
Tried the following situation in Blender 2.42, release version: - Created a ground plane by stretching a cube. Marked it as an actor. Tilted the plane so that it was tilted about 25 degrees from horizontal. - Created a smaller cube, and a cone, above the ground plane. Marked both as Actor and Dynami...
- Fri Jun 30, 2006 5:01 am
- Forum: Research and development discussion about Collision Detection and Physics Simulation
- Topic: Microsoft simulation engine
- Replies: 1
- Views: 5464
Microsoft's physics engine
Microsoft is licensing the Novodex physics engine, as used by Ageia
The Microsoft robotics effort is actually quite small, and their system doesn't do much yet. Imagine Lego Mindstorms implemented via Microsoft Web Services using .NET and you'll have the picture.
The Microsoft robotics effort is actually quite small, and their system doesn't do much yet. Imagine Lego Mindstorms implemented via Microsoft Web Services using .NET and you'll have the picture.
- Tue Aug 16, 2005 7:50 pm
- Forum: Links, Papers, Libraries, Demos, Movies, Comparisons
- Topic: The first ragdoll, from 1997
- Replies: 0
- Views: 5991
The first ragdoll, from 1997
Here, from 1997, is our Falling Bodies, probably the first system to do good rag-doll physics. All the hard cases work. Enjoy. http://www.animats.com/topics/videos.html This is a true spring-damper system, the first one that really worked right. It'snot an impulse-constraint system, so there's no &q...